diff --git a/client-cli/cli_lib/network.py b/client-cli/cli_lib/network.py
index df375ce7..e61ba4f4 100644
--- a/client-cli/cli_lib/network.py
+++ b/client-cli/cli_lib/network.py
@@ -29,7 +29,7 @@ def isValidMAC(macaddr):
                             ^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$
                          )
                          """,
-                         re.VERBOSE|re.IGNORECASE)
+                         re.VERBOSE | re.IGNORECASE)
 
     if allowed.match(macaddr):
         return True
diff --git a/daemon-common/network.py b/daemon-common/network.py
index 68f2f1c7..24f9ada0 100644
--- a/daemon-common/network.py
+++ b/daemon-common/network.py
@@ -201,7 +201,7 @@ def isValidMAC(macaddr):
                             ^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$
                          )
                          """,
-                         re.VERBOSE|re.IGNORECASE)
+                         re.VERBOSE | re.IGNORECASE)
 
     if allowed.match(macaddr):
         return True